Performance of my first ST was great. Although when the air temperture outside was hot my first ST's performance fell. The car kept up with the likes of 197 RX8 even had fun with 320 BWM's. I had the car timed at 7.8 seconds 0-60 but that was with only 2 bars worth of fuel and only me in the car.
It's most likely down to luck. Some people just seem to get no luck with cars.

I've yet to open the taps on my second, but it seems to be quicker, altough thats prolly just down to me. I'll test properly after 1000 miles.